Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles
We study the dynamics of polymer chains in a bath of self-propelled particles (SPP) by extensive Langevin dynamics simulations in a two-dimensional model system. Specifically, we analyse the polymer looping properties versus the SPP activity and investigate how the presence of the active particles a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/11/113008 |
| _version_ | 1827873798309806080 |
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| author | Jaeoh Shin Andrey G Cherstvy Won Kyu Kim Ralf Metzler |
| author_facet | Jaeoh Shin Andrey G Cherstvy Won Kyu Kim Ralf Metzler |
| author_sort | Jaeoh Shin |
| collection | DOAJ |
| description | We study the dynamics of polymer chains in a bath of self-propelled particles (SPP) by extensive Langevin dynamics simulations in a two-dimensional model system. Specifically, we analyse the polymer looping properties versus the SPP activity and investigate how the presence of the active particles alters the chain conformational statistics. We find that SPPs tend to extend flexible polymer chains, while they rather compactify stiffer semiflexible polymers, in agreement with previous results. Here we show that higher activities of SPPs yield a higher effective temperature of the bath and thus facilitate the looping kinetics of a passive polymer chain. We explicitly compute the looping probability and looping time in a wide range of the model parameters. We also analyse the motion of a monomeric tracer particle and the polymer’s centre of mass in the presence of the active particles in terms of the time averaged mean squared displacement, revealing a giant diffusivity enhancement for the polymer chain via SPP pooling. Our results are applicable to rationalising the dimensions and looping kinetics of biopolymers at constantly fluctuating and often actively driven conditions inside biological cells or in suspensions of active colloidal particles or bacteria cells. |
| first_indexed | 2024-03-12T16:42:22Z |
| format | Article |
| id | doaj.art-53b963e4c35b4428be7939263b766060 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:22Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
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| series | New Journal of Physics |
| spelling | doaj.art-53b963e4c35b4428be7939263b7660602023-08-08T14:23:41ZengIOP PublishingNew Journal of Physics1367-26302015-01-01171111300810.1088/1367-2630/17/11/113008Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particlesJaeoh Shin0Andrey G Cherstvy1Won Kyu Kim2Ralf Metzler3Institute for Physics & Astronomy, University of Potsdam , D-14476 Potsdam-Golm, Germany; Max Planck Institute for the Physics of Complex Systems , D-01187 Dresden, GermanyInstitute for Physics & Astronomy, University of Potsdam , D-14476 Potsdam-Golm, GermanyFachbereich Physik, Freie Universität Berlin , D-14195 Berlin, GermanyInstitute for Physics & Astronomy, University of Potsdam , D-14476 Potsdam-Golm, Germany; Department of Physics, Tampere University of Technology , 33101 Tampere, FinlandWe study the dynamics of polymer chains in a bath of self-propelled particles (SPP) by extensive Langevin dynamics simulations in a two-dimensional model system. Specifically, we analyse the polymer looping properties versus the SPP activity and investigate how the presence of the active particles alters the chain conformational statistics. We find that SPPs tend to extend flexible polymer chains, while they rather compactify stiffer semiflexible polymers, in agreement with previous results. Here we show that higher activities of SPPs yield a higher effective temperature of the bath and thus facilitate the looping kinetics of a passive polymer chain. We explicitly compute the looping probability and looping time in a wide range of the model parameters. We also analyse the motion of a monomeric tracer particle and the polymer’s centre of mass in the presence of the active particles in terms of the time averaged mean squared displacement, revealing a giant diffusivity enhancement for the polymer chain via SPP pooling. Our results are applicable to rationalising the dimensions and looping kinetics of biopolymers at constantly fluctuating and often actively driven conditions inside biological cells or in suspensions of active colloidal particles or bacteria cells.https://doi.org/10.1088/1367-2630/17/11/113008diffusionactive transportpolymers |
| spellingShingle | Jaeoh Shin Andrey G Cherstvy Won Kyu Kim Ralf Metzler Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles New Journal of Physics diffusion active transport polymers |
| title | Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles |
| title_full | Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles |
| title_fullStr | Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles |
| title_full_unstemmed | Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles |
| title_short | Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles |
| title_sort | facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles |
| topic | diffusion active transport polymers |
| url | https://doi.org/10.1088/1367-2630/17/11/113008 |
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